Configuring Broadcast Relay; Directed Broadcast Forwarding - Avaya G250 Administration

Configuring the router
The following example defines a reservation pool for data devices:
G350-001(super)# ip dhcp pool 3
G350-001(super-DHCP 3)# name "Data 1 Server"
Done!
G350-001(super-DHCP 3)# start-ip-addr 135.64.20.61
Done!
G350-001(super-DHCP 3)# end-ip-addr 135.64.20.61
Done!
G350-001(super-DHCP 3)# subnet-mask 27
Done!
G350-001(super-DHCP 3)# client-identifier 01:11:22:33:44:55:66
Done!
G350-001(super-DHCP 3)# default-router 135.64.20.33
Done!
G350-001(super-DHCP 3)# dns-server 10.10.1.1
Done!
G350-001(super-DHCP 3)# exit
G350-001(super)# ip dhcp activate pool 3
Done!
G350-001(super)#

Configuring broadcast relay

When you configure broadcast relay, the router forwards broadcast packets across interfaces.
You can configure broadcast relay types including directed broadcast forwarding, NetBIOS
rebroadcast, and DHCP and BOOTP client broadcast.
For more information about DHCP and BOOTP client broadcast, see
BOOTP relay

Directed broadcast forwarding

A directed broadcast is an IP packet whose destination address is the broadcast address of a
network or subnet. A directed broadcast causes every host on the network to respond. You can
use directed broadcasts to obtain a list of all active hosts on the network. A hostile user can
exploit directed broadcasts to launch a denial-of-service attack on the network. For each
interface on the Avaya G250/G350 Media Gateway, you can configure whether the G250/G350
forwards directed broadcast packets to the network address or subnet mask address of the
interface.
Use the ip directed-broadcast command to enable directed broadcast forwarding on an
interface. Use the no form of this command to disable directed broadcast forwarding on an
interface.
430 Administration for the Avaya G250 and Avaya G350 Media Gateways
on page 422.
Configuring DHCP and